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3 Sheets-Sheet 1.

(Model.)

0. E. CHURCH. INJECTOR.

No. 405,990. Patented June 25, 1889.

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N LTERS. P'nni rbl (ModeL) 3 Sheets-Sheet 2.

O. E. CHURGH. INJECTOR.

No. 405,990. Patented June 25, 1889.

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No. 405,990. Patented June 25, 1889.

UNITED STATES PATENT OFFICE.

CHARLES E. CHURCH, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE HANCOCKINSPIRATOR COMPANY, OF SAME PLACE.

INJECTOR.

SPECIFICATION forming part of Letters Patent No. 405,990, dated June 25,1889.

Application filed July 17, 1888. Serial No. 280,198- (ModeL) To all whomit may concern.-

Be it known that I, CHARLES E. CHUncH, of Boston, in the county ofSuffolk, and in the State of Massachusetts, have invented certain newand useful Improvements in Injectors; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawiu gs, in which Figure 1 shows avertical section of my improved injector through the axial lines of thelifting apparatus and forcing apparatus and the valve-connection, aportion only of such connection being shown in section. Fig. 2 is a.horizontal section on line 00 (ref Fig. 1. Fig. 3 is a vertical sectionthrough the axial line of the valve-connection, on line y y, and atright angles to the plane of the section represented in Fig. 1, aportion only of the valveconnection being shown in section. Figs. 4: and5 show plan views of the steam-admission valve on its seat in differentpositions, and showin section steam-passages leading to the liftingapparatus and forcing apparatus, respectively. Fig. 6 is a plan view ofthe upper portion of the valve-connection and the top of theoverflow-valve, together with the bonnet removed from the machine. Fig.7 is a horizontal sect-ion through the instrument on line 2 of Fig. 1,looking from above, the seat of the overflow-valve being in section, andthe position of the overflow-valve below being indicated by dottedlines. Fig. 8 is a horizontal section of the overflow-valve seat on thesame line .2, Fig. 1, looking from above, but the overflow-valve isshown in a different position, as indicated by the dotted lines. Fig. 9is a plan view of the overflowvalve seat, looking from below, when thevalve and bonnet are removed. Fig. 10 is a perspective View of one ofthe caps which hold in place the steam-j et tube of the lifting and ofthe forcing apparatus, and Fig. 11 is a similar view of a modificationof the cap shown in Fig. 10.

Letters of like name and kind refer to like parts in each of thefigures.

My invention is an improvement upon the injector patented to John T.Hancock J anuary 2, 1877, No. 185,861, known as the inspirator, and itsobject is, first, to so arrange the liftinginjector apparatus of theinspirator relatively to its forcing-injector apparatus that theadmission of steam to the steam-jet tube of each and the opening andclosing of overflows for each are controlled by two valves connected toand operated by a single stem controlled by a single handle; second, toprovide each apparatus of the combined instrument with a free outlet oroverflow to the atmosphere substantially in a direct line with the axialline of each apparatus, in order that the fluid issuing from thecombining-tube of each may be discharged into the free air in startingthe injector by a direct and unobstructed passage, thereby lessening thedetrimental effect of friction due to abrupt changes in the course ofthe discharged current; third, to so arrange the chambers andwater-passages in the instrument when it is set vertically with theoverflow pipe at the bottom that when steam has been shut off from theinstrument the water re maining in it shall. all run out at the overflow-pipe, or back into the well, thereby obviating danger fromfreezing, and enabling the lifting apparatus to start readily; fourth,to simplify the construction and permit easy ac cess to the severaltubes without disturbing the steam-and-water connections, and, fifth, tohold the steam-jet tube of the lifting apparatus and the steam-jet tubeof the forcing apparatus firmly in place by means of the cap-nuts whichclose the top of the steamchamber of each of said apparatus.

The casing of the injector is designated by A B. The pipe for theadmission of the actuating steam is to be connected with the chamber S.The pipe communicating with the well or reservoir is to be connected at\V, and the pipe forthe delivery or discharge of water to the boiler isto be connected at K.

The steam-jet tube of the lifting apparatus is at a, and itscombining-tube is at (1. Steam is supplied to it from the chamber Sthrough a port 11 in the seat '1 controlled by the portion V of thevalve V, and through passage D and chamber D, and the water risesin thepassage W and around the exterior of the combining-tube b and enters thelatter at th space between the tubes (2 and b.

The steam-j et tube of the forcing apparatus is at c, and itscombining-tube is at d. Steam is supplied to it from the chamber Sthrough a port '1) in the seat 1 controlled by the portion V of thevalve V, and through passage E and chamber E, and the fluid deliveredfrom the lifting apparatus rises in the passage or chamber J and aroundthe exterior of the combining-tube cl and enters the latter at the spacebetween the tubes 0 and cl. The chamber J as shown in Figs. 1, 2, and 3,extends around the exterior of the lower end of the chamber Nhereinafter described, a portion of the delivery-chamber K, and thecombining-tube cl.

The steam-admission chamber S is formed in a bonnet which is screwed tothe body of the instrument. l/Vithin this chamber is the flat raisedseat 1) of the steam-admission valve V, formed on or attached to thebody of the instrument. The steam-admission valve V, located within thischamber, is a disk-valve having projections V and V controlling theports 1) and 12 respectively. A recess is formed in its under side,symmetrical to its axis, into which the flattened end N of theconnection N loosely fits, so that the valve must turn when theconnection is turned, but which admits of a slight movement of the valvein other directions in order that it may remainin contact with its seat,even if the seat for any reason is not in a plane exactly at a rightangle to the axis of revolution of the stem, and to allow for wear ofthe valve or its seat and fbr wear of the overflow-valve L and its seat,hereinafter described. By removal of the bonnet,within which is thesteamchamber S, the valve V can be removed by merely lifting it from offthe stem, and access can then be readily had to its seat.- When theinstrument is in operation, this valve is held to its seat by thepressure of steamin the chamber S, and the interior contour of thebonnet is so formed asto act as a stop to prevent it from beingdisengaged from the stem whenever the pressure is removed.

In the body of the instrument a cylindrical chamber N is formedintermediate between and connecting the steam-chamber S at the top ofthe instrument with the overflow-valve chamber M at its bottom,withinwhich, loosely fitting, the connection N is journaled. The overflow-valve chamber M is constructed similarly to the steam-admissionchamber, being formed in a bonnet M, screwed to the body of theinstrument. Within this chamber is the flat raised seat 1 of theoverflow-valve L, formed on or attached to the body of the instrumentand provided with two ports, one Z communicating with the chamber J andthe other Z communicating with the chamber'K.

. The overflow-valve L, located within this chamber,is a hollowcylindrical disk-valve ively come in contact with a pin 19, attached tothe body of the instrument, limit the motion of the valve. The hollowprolongation O of the valve L projects through the bonnet M, and to itsprojecting end is attached a handle P, by means of which, in operatingthe machine, the movements of the valve L and the valve V (by means ofthe connection N,which is shown as a stem formed integral with valve L)are controlled.

The connection N, by means of which the valves V and L are connected inthe intermediate chamber N instead of being made integral with the valveL or rigidly attached to it, may be made independent of it and beloosely fitted in a recess in the valve L like that in. the valve V.

Within the bonnet M, at its lower part, a space is formed to receive anelastic packing M to preventleakage around the tubular prolongation O,which is confined in position by a gland M loosely fitted in the bonnetand around the tubular prolongation O, and by a spring M interposedbetween the enlarged portion of the valve L and the gland M It is alsocompressed around the tubular prolongation 0, when the instrument is inoperation, by wateradmitted from the chamber K, through the port Z andthe depression L in the seating-surface of the valve L, thence aroundthe exterior of the enlarged portion of the valve L in theoverflow-valve chamber, and through ports M formed in a shoulder in thebonnet M beneath the valve L. These ports M ar e partially shown in planin Fig. 7, and one'of; them is shown in elevation in Fig. 1. The objectof thus admitting the water into the overflow-valve chamber is not ionly to hold the packing-ring M confined in position, but primarily tohold the valve L up to its seat against the pressures which exist inchambers J and K.

In order to prevent the removal of the valve L from its seat when thereis no pressure beneath it in the interior of the overflow-valve chamberM a shoulder M is formed, between which and the seat Z there is spaceenough for the valve L to be moved on its seat freely, but not enough toallow more than a slight movement away from its seat. If the spring M bemade stiff enough to hold the valve L to its seat against the pressurein the chambers J and K, the shoulder M in the interior of theoverflow-valve chamber will not be, necessary; and if the valve L bethen modified so as to shut off the influx of water to theoverflow-valve chamber from the deliverychamber K, when the instrumentis in full operation, the elastic packing M may also be omitted.

The steam-chambers I) and E are closed at the top by caps F, which notonly serve this purpose, but also hold in position the steamjet tubes toand 0. Each is provided with a screw-thread F which fits in the threadedbody of the instrument, and with a shoulder F, which, when the cap isscrewed down, closes the top of the chamber. One or more projections FFig. 10, are provided, extending below the threaded portion of the cap,which are made long enough to bear upon the steam-jet tube before theshoulder F comes to its seat on the body. lVhen the cap-nut is screweddown to its seat, the projections F are sprung inwardly, being therebyshortened, and thus hold the j et-tube firmlyin position. Thisconstruction allows for slightvariations in the relative distancesbetween these parts, whether due to workmanship or expansion andcontraction of the body, or to wear.

Instead of deflecting the spring projections, they may project straightbelow the cap and be made long enough to bear upon the steamjet tubebefore the shoulder F comes to its seat. In this construction, when thecap-nut is screwed down, the projections F if made, as they should be,of comparatively small area, will be compressed and will thus hold thestean1j et tube firmly in position. By removing the cap-nuts it isapparent that the steam-jet tubes may be lifted out and easy access hadto remove the combining-tubes or obstructions in them.

The operation of the instrument is as follows: lVhen the handle Pisturned to put the valves V and L in the positions shown in Fig. 1, steamis shut off from the apparatus, as both the ports 1 and r are closed,and the ports L and L in the overflow-valve L are partially open, sothat an outlet is afforded from both the lifting apparatus and theforcing apparatus to the free air. Upon turning the handle P to bringthe valve V into the position shown in Fig. 4 from the position shown inFig. 1, and by the dotted lines in Fig. 5, steam will be admittedthrough the portr, the passage D, and chamber D to the steam-jet tube aof the lifting apparatus. The port 42 remaining covered, the steam isstill cut off from the forcing apparatus. This movement of the handle Pwill have turned the overflow-valve L to the position shown in Fig. 8,so that its port L will register with the port Z in the seat Z, and theport L will register with the enlarged lower part of the port Z Anunobstructed passage to the atmosphere from the chamber J is thusafforded through the ports Z L and the hollow pro- 'longation O. Aportion of the steam may pass up through the chamber J and through thecombiningtube d of the forcing apparatus into the chamber K, whence itwill have free course to the air through the ports Z and L and thehollow prolongation 0. When water rises from the well or reservoir as aresult of this action of the lifting apparatus, it will pursue the samecourse through the instrument as did the steam, and it will bedischarged at the lower end of the hollow prolongation 0. When the waterappears at 0, (showing that the lifting apparatus is in operation,) thehandle P is turned farther in the same direction as before, and the portL of the overflow-valve will be moved so that it will cease to registerwith the port Z, while the port L will still register with the port Z Inthe meantime the port r will remain open, and the port o through whichsteam is admitted to the forcing apparatus, will remain closed until ator about the time when the overflow from the lifting apparatus is cutoff by the valve L. The lifting apparatus will now be fully inoperation, and the water delivered from it must pass through the chamberJ, through the combining-tube (Z of the forcing apparatus, and into thechamber K, whence, as before, it escapes to the atmosphere through the1101- low prolongation O. The handle P being now turned still farther inthe same direction as before, the port 11 in the steam-valve seat willbe opened and steam will thus be admitted through the passage E andchamber E to the steam-jet tube 0 of the forcing apparatus, where itwill act upon the water passing through the tube (Z and accelerate itsvelocity. After the port o is wide open the fart-her movement of thehandle P in the same direction as before will cause the port L to nolonger register with the port Z in the seat, and consequently the escapeto the atmosphere through 0 will be out off and the water dischargedfrom the forcing apparatus will be delivered to the boiler through apipe connected to the chamber K. The steamvalve will then be in theposition shown in Fig. 5 and the overflow-valve in that indicated bydotted lines in Fig. 7, the stop L being in contact with the pin p. Thecombined apparatus will now be in full operation, raising water anddelivering it to the boiler, as does the inspira'tor. The overflowvalveL, as has been described, will be held tightly against its seat by wateradmitted from the chamber K through the port Z the depression L aroundthe exterior of the enlarged portion of. the valve, and through ports Mbeneath the valve, and at the same time the packing M will be heldcompressed, so as to prevent any leakage around the eX- terior of theprolongation 0.

Instead of the packing M and gland M located as described, astuffing-box of the usual construction may be applied on the outside ofthe bonnet.

Chamber N need not be closed, for the steam-valve V, if tight, preventsany access of steam to this chamber, and the overflowor the chambers Jand K, and vice versa, and

thus leakage is doubly guarded against.

Itis obvious that my improved arrangement of the steam and overflowchambers with the valves controlling, respectively, the admission ofsteam and the overflow to the atmosphere, is equally well adapted to asingle lifting apparatus or forcing apparatus as to the combinedapparatus herein shown and described. For example, if a liftingapparatus only is desired, the portion V of the valve V and thecorresponding port v in its seat would be dispensed with, the port Lwould be closed, the tubes of the forcing apparatus and theirinclosing-chambers would be removed, and the chamber J would be made todischarge into the chamber K. The port Z should remain to aiford aconnection with the overflow-chamber, as before. If a forcing apparatusis desired, it would only be necessary to substitute the tubes 0 and clfor the tubes at and b in the chamber in the casing A of the apparatusas modified for a lifting apparatus.

Having thus described my invention, what I claim is- 1. In an injector,a steam-chamber containing a valve to control the admission of steam,and an overflow-chamber containing a valve to control the overflow tothe atmosphere, the two chambers being connected by an intermediatechamber N communication between the steam-chamber and theoverflow-chamber through the intermediate chamber being prevented by oneor both of the valves, substantially as described.

2. .In an injector, a steam-chamber and an overflow-chamber, a valve inthe former'to control the admission of steam and a valve in the latterto control the overflow to the atmosphere, the two valves beingconnected to and operated by a single stem, substantially as described.

by a stem extending through the valve-seats,

leakage around which is prevented by the valves, substantially asdescribed.

l. In an injector containing two sets of jet apparatus, a steam-chamberand an overflowchamber, a valve in the former to control the admissionof steam to each apparatus and a valve in the latter to control theoverflow to the atmosphere from each, the two valves being connected toand operated by a single stem, substantially as described.

5. In an injector, a steam-chamber and an overflow-chamber, and anintermediate chamber N connecting the two, the steam-chamber beingprovided with a valve to control the admission of steam, theoverfiow-chamber with a valve to control the overflow to the atmosphere,the two valves being joined by a connection inthe intermediate chamber,whereby the movement of one of the valves operates the other,substantially as described.

6. In an injector containing two sets of jet apparatus, thecombining-tubes of which converge in the direction of the fiow of thefluid through them, an outlet or overflow passage to the atmosphere,located substantially in line with the respective axial lines of the twocombining-tubes, whereby the fluid issuing from each combining-tube isdischarged into the free air by a direct passage, substantially as andfor the purpose described.

7. In an injector, a valve controlling the admission of steam and avalve controlling the overflow to the atmosphere, the two valves beingconnected to each other and operated the one by the other, thedischarge-outlet from the over flow-valve being formed within aprolongation of that valve, substantially as described. 8. In aninjector, an overflow-valve located in a chamber the interior of whichis provided with a shoulder, between which and the valve-seat there isspace enough to permit the valve to be rotated freely on its seat, butnot enough to allow more than a slight movement away from its seat,substantially as and for the purpose described.

9. In an injector, an overflow-valve having a discharge-outlet to theatmosphere formed in its prolongation and located in a chamber, incombination with a spring whereby the valve is held against its seat,substantially as and for the purpose described.

10. In an injector, an overflow-valv'ehav- 'ing a discharge-outlet tothe atmosphere formed in its prolongation and located in a chamber, apassage from the delivery-chamber of the injector extending into theoverflow-valve chamber and beneath the exterior of the valve, whereby,when the injector is in operation, the valve is held against its seat bywater under pressure, substantially as described.

11. In an injector, an overflow-valve having a discharge -outlet to theatmosphere formed in its prolongation and located in a chamber providedwith elastic packing about the exterior of the prolongation, a passagefrom the delivery-chamber of the injector extending into theoverflow-valve chamber, whereby, when the injector is in operation, thevalve is held against its seat and the packing about its prolongation iscompressed by pressure of the fluid thus admitted to the overflow-Valvechamber, substantially as described.

12. In an injector, a cap-nut F, provided with a shoulder F, ascrew-thread F and one or more projections F in combination with thecasing of the injector and the steamjet tube, whereby, when the cap-nutis screwed to its seat, the steam-chamber is closed and the steam-jettube is held firmly in position, to

substantially as an d for the purpose described.

In testimony that I claim the foregoing I have hereunto set my hand this22d day of May, 1888.

CHAS. E. CHURCH. Witnesses:

ELMER P. IIoWE,

HARTLEY F. ATWOOD.

